memorial park vs cemetery

memorial park and cemetery both are nouns.

Word	Noun	Adjective	Verb	Adverb
memorial park	Yes	No	No	No
cemetery	Yes	No	No	No

As nouns, memorial park and cemetery are synonyms defined as:

Other synonyms of memorial park include burial ground, burial site, burying ground, graveyard, necropolis.

memorial park (noun)	cemetery (noun)
a tract of land used for burials	a tract of land used for burials